On Sun, Oct 20, 2024, 20:52 Zachary Santer <[email protected]> wrote:
>
> Item 8 is just odd and is on the verge of being a dealbreaker. Not to
> go off on another tangent, but what on Earth?
>
AFAICT it's the non-POSIX-mode Bash behavior that is unusual.
While all shells will have treat single quotes as literal here:
$ V=set
$ echo "${V+'x'}"
'x'
Pretty much every other shell (and bash in posix mode) will continue to do
so for:
$ echo "${V+'x}"
'x
...while bash will treat this as an unterminated command. Because in bash,
this is a weird kind of quoting, where the quotes are preserved but any }
character within them loses its special meaning:
$ unset U
$ (set +o posix; echo "${U+'}'y}")
$ (set -o posix; echo "${U+'}'y}")
'y}
>
